After a long jump, an athlete is made to land on the sand to lengthen the duration of impact. This decreases the momentum and power with which he hits the earth. As a result, the athlete is spared injury. Also, the sand is easily compressed which helps the muscles and bones heal faster.
Now, this isn't exactly why sports halls of fame exist but it does help explain the need for them. The Olympic Sports Hall of Fame in Lausanne, Switzerland was created in 1950 for the purpose of honoring those who have achieved excellence in their fields through achievement at the Olympics or other international competitions.
The International Tennis Hall of Fame in Newport News, Virginia was founded in 1980 and has been growing ever since. It aims to honor all tennis players who have shown talent and passion for the game. Inductees include such greats as Rod Laver, John McEnroe, and Pete Sampras.
The National Baseball Hall of Fame in Cooperstown, New York was built in 1939 and has been operating successfully ever since. It honors individuals who have excelled in baseball either on the field or in front of cameras throughout the history of the sport. Inductees include George S. Paige, Charles Thomas Jackson, Eddie Collins, and Bob Lemon.
A high jump sporting event requires players to land on either a cushioned bed or a sand bed. This increases the time it takes for the athlete's fall to stop after performing the leap. This reduces the rate of change of momentum and, as a result, the force. It is this reduction in force that allows players to perform more ambitious jumps.
The use of sand beds in sports was introduced by the German Olympic Committee in the early 1950s. Before then, athletes usually landed on a soft cushion which was attached to a pole at one end and tied to a clock at the other. The tie prevented the pole from acting as a brake when the athlete fell toward it. By replacing this with a sand bed, they were able to reduce the rate of change of momentum and, as a result, the distance an athlete could jump.
This must have been useful for high jumpers who were trying to clear their headgear! The device has become standard practice in all major sport events including the Olympics, World Championships and European Championships.
It is also used by sprinters before starting races to bring up their heart rates and reduce the chance of injury from falling during intense competitions. Sand beds can be found in most large cities around the world where summer athletics meetings are held. At these events, you will often see high jump and long jump contests taking place over cushioned poles with sand beds at their upper ends.
Why is it possible for a long jumper to leap on sand but not on a cement floor? This is because, while leaping on sand, the feet burrow deeply into the sand, exerting less energy on the sand. On the other hand, when jumping on concrete, the feet produce little if any backward movement of the body as it approaches the ground. Thus, more energy is required from the muscles to achieve the same result.
The human body is capable of producing great forces at very small attachments point. However far a person may be from a heavy object, muscle cells in his body will still generate enough force to lift that object. The problem arises when the attachment points are large relative to the size of the muscles involved. In this case, the object will be lifted only so high before its weight overshadows the available lifting force and causes it to drop back down to earth.
As we have seen, a long jumper uses less energy when leaping onto sand than when leaping onto concrete, because he produces less forward momentum when landing on sand. This means that his body's ability to produce force is not being used up by the effort of jumping; instead, it is being put to use reducing his forward momentum after landing. Since reduced momentum requires additional energy, this shows that a long jumper can stay in the air longer than someone who cannot leap onto sand because they would use up their energy too quickly.